Journal ArticleDOI
The Asian monsoon over the past 640,000 years and ice age terminations
Hai Cheng,R. Lawrence Edwards,Ashish Sinha,Christoph Spötl,Liang Yi,Shitao Chen,Megan M. Kelly,Gayatri Kathayat,Xianfeng Wang,Xianglei Li,Xinggong Kong,Yongjin Wang,Youfeng Ning,Haiwei Zhang +13 more
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TLDR
Observations indicate that insolation, in part, sets the pace of the occurrence of millennial-scale events, including those associated with terminations and ‘unfinished terminations’.Abstract:
Oxygen isotope records from Chinese caves characterize changes in both the Asian monsoon and global climate. Here, using our new speleothem data, we extend the Chinese record to cover the full uranium/thorium dating range, that is, the past 640,000 years. The record’s length and temporal precision allow us to test the idea that insolation changes caused by the Earth’s precession drove the terminations of each of the last seven ice ages as well as the millennia-long intervals of reduced monsoon rainfall associated with each of the terminations. On the basis of our record’s timing, the terminations are separated by four or five precession cycles, supporting the idea that the ‘100,000-year’ ice age cycle is an average of discrete numbers of precession cycles. Furthermore, the suborbital component of monsoon rainfall variability exhibits power in both the precession and obliquity bands, and is nearly in anti-phase with summer boreal insolation. These observations indicate that insolation, in part, sets the pace of the occurrence of millennial-scale events, including those associated with terminations and ‘unfinished terminations’. Records of the Asian monsoon have been extended to 640,000 years ago, and confirm both that the 100,000-year ice age cycle results from integral numbers of precessional cycles and that insolation influences the pacing of major millennial-scale climate events. Prior records of the Asian monsoon have revealed cyclic variations over hundreds of thousands of years, probably driven by variations in insolation caused by the precession of Earth's orbit. Hai Cheng and colleagues now provide a speleothem record from Chinese cave samples that extends earlier records to 640,000 years ago, close to the maximum age possible with uranium/thorium dating. This spectacular record confirms that the characteristic '100,000-year' ice age cycle corresponds to an integral number (four or five) of precession cycles, and that insolation influences millennial-scale variations in monsoon strength.read more
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The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0-55 cal kBP)
Paula J. Reimer,William E. N. Austin,Edouard Bard,Alex Bayliss,Paul G. Blackwell,Christopher Bronk Ramsey,Martin Butzin,Hai Cheng,Hai Cheng,R. Lawrence Edwards,R. Lawrence Edwards,Michael Friedrich,Pieter Meiert Grootes,Thomas P. Guilderson,Thomas P. Guilderson,Irka Hajdas,Timothy J Heaton,Alan G. Hogg,Konrad A Hughen,Bernd Kromer,Sturt W. Manning,Raimund Muscheler,Jonathan G. Palmer,Charlotte Pearson,Johannes van der Plicht,Ron W Reimer,David Richards,E. Marian Scott,John Southon,Christian Turney,Lukas Wacker,Florian Adolphi,Ulf Büntgen,Manuela Capano,Simon Fahrni,Alexandra Fogtmann-Schulz,Ronny Friedrich,Peter Köhler,Sabrina G K Kudsk,Fusa Miyake,Jesper V. Olsen,Frederick Reinig,Minoru Sakamoto,Adam Sookdeo,Adam Sookdeo,Sahra Talamo +45 more
TL;DR: In this article, the international 14C calibration curves for both the Northern and Southern Hemispheres, as well as for the ocean surface layer, have been updated to include a wealth of new data and extended to 55,000 cal BP.
Journal ArticleDOI
The global monsoon across time scales: Mechanisms and outstanding issues
Pinxian Wang,Bin Wang,Bin Wang,Hai Cheng,Hai Cheng,John T. Fasullo,Zhengtang Guo,Thorsten Kiefer,Zheng Yu Liu,Zheng Yu Liu +9 more
TL;DR: The second synthesis of the PAGES GM Working Group following the first synthesis “The Global Monsoon across Time Scales: coherent variability of regional monsoons” published in 2014 (Climate of the Past, 10, 2007-2052) as mentioned in this paper addresses driving mechanisms of global monsoon variability and outstanding issues in GM science.
Journal ArticleDOI
Hydroclimate changes across the Amazon lowlands over the past 45,000 years
Xianfeng Wang,R. Lawrence Edwards,Augusto S. Auler,Hai Cheng,Hai Cheng,Xinggong Kong,Yongjin Wang,Francisco W. Cruz,Jeffrey A. Dorale,Hong-Wei Chiang +9 more
TL;DR: The Amazon was widely drier during the last glacial period, with much less recycling of water and probably reduced plant transpiration, although the rainforest persisted throughout this time.
Journal ArticleDOI
The Indian monsoon variability and civilization changes in the Indian subcontinent
Gayatri Kathayat,Hai Cheng,Hai Cheng,Ashish Sinha,Liang Yi,Xianglei Li,Haiwei Zhang,Hangying Li,Youfeng Ning,R. Lawrence Edwards +9 more
TL;DR: The data suggest that significant shifts in monsoon rainfall have occurred in concert with changes in the Northern Hemisphere temperatures and the discharges of the Himalayan rivers, suggesting a plausible role of climate change in shaping the important chapters of the history of human civilization in the Indian subcontinent.
Journal ArticleDOI
A 550,000-year record of East Asian monsoon rainfall from 10Be in loess
J. Warren Beck,Weijian Zhou,Cheng Li,Zhenkun Wu,Zhenkun Wu,Lara White,Feng Xian,Xianghui Kong,Xianghui Kong,Zhisheng An +9 more
TL;DR: A 550,000-year-long record of East Asian summer monsoon rainfall from Chinese loess is derived, arguing that both EASM intensity and Chinese cave δ18O are not governed by high-northern-latitude insolation, as suggested by others, but rather by low-latitudes interhemispheric insolation gradients, which may also strongly influence global ice volume via monsoon dynamics.
References
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Journal ArticleDOI
A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records
TL;DR: In this paper, a 53-Myr stack (LR04) of benthic δ18O records from 57 globally distributed sites aligned by an automated graphic correlation algorithm is presented.
Journal ArticleDOI
Variations in the Earth's Orbit: Pacemaker of the Ice Ages
TL;DR: It is concluded that changes in the earth's orbital geometry are the fundamental cause of the succession of Quaternary ice ages and a model of future climate based on the observed orbital-climate relationships, but ignoring anthropogenic effects, predicts that the long-term trend over the next sevem thousand years is toward extensive Northern Hemisphere glaciation.
Journal ArticleDOI
A High-Resolution Absolute-Dated Late Pleistocene Monsoon Record from Hulu Cave, China
Yongjin Wang,Yongjin Wang,Hai Cheng,Richard Lawrence Edwards,Zhisheng An,Jiangying Wu,Chuan-Chou Shen,Jeffrey A. Dorale +7 more
TL;DR: The record links North Atlantic climate with the meridional transport of heat and moisture from the warmest part of the ocean where the summer East Asian Monsoon originates and generally agrees with the timing of temperature changes from the Greenland Ice Sheet Project Two (GISP2).
Journal ArticleDOI
Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years
Jean Jouzel,Valérie Masson-Delmotte,O. Cattani,Gabrielle Dreyfus,S. Falourd,G. P. Hoffmann,Bénédicte Minster,Julius Nouet,Jean-Marc Barnola,Jérôme Chappellaz,Hubertus Fischer,J. C. Gallet,Sigfus J Johnsen,Sigfus J Johnsen,Markus Leuenberger,L. Loulergue,D. Luethi,Hans Oerter,Frédéric Parrenin,Grant M. Raisbeck,Dominique Raynaud,Adrian Schilt,Jakob Schwander,Enricomaria Selmo,Roland Souchez,Renato Spahni,Bernhard Stauffer,Jørgen Peder Steffensen,Barbara Stenni,Thomas F. Stocker,Jean-Louis Tison,Martin Werner,Eric W. Wolff +32 more
TL;DR: It is suggested that the interplay between obliquity and precession accounts for the variable intensity of interglacial periods in ice core records.
Journal ArticleDOI
Millennial- and orbital-scale changes in the East Asian monsoon over the past 224,000 years
Yongjin Wang,Hai Cheng,Hai Cheng,R. Lawrence Edwards,Xinggong Kong,Xiaohua Shao,Shitao Chen,Jiangyin Wu,Xiouyang Jiang,Xianfeng Wang,Zhisheng An +10 more
TL;DR: An absolute-dated oxygen isotope record from Sanbao cave, central China, is presented that completes a Chinese-cave-based record of the strength of the East Asian monsoon that covers the past 224,000 years, supporting the idea that tropical/subtropical monsoons respond dominantly and directly to changes in Northern Hemisphere summer insolation on orbital timescales.